Cup for oil-wells.



No. 723,096- PATBNTED MAR. 1'7, 1903.

M. WERT. l

CUP POL oIL wLLLs. APPLIOATIOI FILED SEPT. 9, 1901. No MODEL.

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i v, @mi llamjary.

UNITED STATES PATENT OFFICE.

MARTIN WERT, OF PARKERS LANDINGPENSYLVANIA, ASSIGNOR OF ONE- HALE TO VILLIAM G. MCGLAUGHLIN AND GEORGE T. MCGLAUGI-ILIN, OF PARKERS LANDINGL PENNSYLVANIA.

cui Foe OIL-WELLS.

SPECIFICATION forming part of Letters Patent No. 723,096, dated March 17, 1903. Application filed September 9, 1901. Serial No. 74,848. (No model.)

Z'o @ZZ whom t may concern;

Be it known that I, MARTIN WERT, a citizen ofthe United States,residing at Parkers Landing, in the county of Armstrong and State of Pennsylvania, haveinvented a new and useful Cup for Oil-Wells, of which the following is a specification,

This invention relates to cups for oil-wells,

y and has for its object to present acheap, du-

lo rable, and thoroughly-efficientdevice for the pnrpose'stated and one that may be readily manufactured and easily applied lo position for use. l

A further object is to presentacup having x5 a bearing-surface composed of twisted or braided filamentous material associated with the shell or body in such manner as to constitute an integral or fixed part thereof, but

to be yieldable independently of the shell,

` 2o whereby in` use all danger of separation of the'bearing-surface from the cup will be ob- Viated and a closeand thoroughly-effective contact with the bearing-surface and the pump-barrel will be assured. z5 A further Objectis topresent a novel form of reinforcer or stiffener for the shell which will operate to cause the cup eeetually to withstand thepressure to which it is subjected in use.

l 3o With these and other objects "in view, as

will appear as the nature of the invention Vis l better` understood, the same consists in the `l novel construction and combination of parts of a cup for oil-wells, as will be hereinafter f3`5 fully described andclaimed.

In the accompanying drawings, forming a part of this specification, and in which like numerals of reference indicate corresponding parts, there is illustrated a form of embodi- 4o ment of theinvention capable of carrying the same into effect, it being understood that the structure herein exhibited may be varied or changed as `to shape, proportion, and exact mannerof assemblage without departing from `the spirit of the invention, and in the drawings-f i Figure 1 is a view in perspective of an oilwell cup characterizing this invention. Fig'. 2is a view in transverse section, showing a v3 the cordage-wound bearing-surface of the i Cup. i

preferred form of stiffener'or reinforcer-as- 5o sociated with the cup. Fig. 3 is a viewin plan, showing in blank form the stylefof stilfener exhibited in Fig. 2. Fig. 4 is a transverse sectional View showing a modified form of stiffener that may be employed in lieu of that shown in Fig. 3.

Referring to the drawings, l designates the body or cn p, 2 the reinforcer or stiffener, and

vmaterial adapted for the purpose designed, 7o

the object of employing cordage as a bearingsurface being to present a surface that will combine great wearing property with the req- 4uisite resiliency ro impinge the well-barrel with sufficient force to render the device thoroughly effective for the purpose designed.

The form of stiifener shown in Fig. 2 con- `sists of a sheet of metal of any desired thickness which is circular in contour and is provided with a central orifice t of a size toeor- 8o lrespond with the pum p-rod opening 5 of the cup, with a plurality of edge kerfs 6, and with a plurality of orifices 7, disposed over the entire area of the plate. Prior to associating the stiffener with the cup it is stamped or otherwise shaped to conform to thecontour `of the cup, as shown in Fig. 2.

The two salient features of the present invention are the reinforcing of the shell throughout its entire area, presenting there- 9o by a practically nou-yielding structure, and the employment of a continuous winding of cordage to constitute a yielding bearing-surface. In order that the said surface may possess the desired yielding quality, only a small radius of the cord or rope is permanently associated with the shell, so that as the major portion of the winding projects beyond the shell a yielding, thoroughly-effective, and long-wearing surface will be provided.

One procedure that may be employed for making the oil-cup of the present invention consists in placing a layer or layers of soft un'vulcanized rubber uponthe male member of a suitable mold to present the inner wall of the shell; then placing over this body of rubber the stifener 2, which has been previously stamped or otherwise formed to the proper shape and extends from the Wall of the pump-rod opening to the edge or mouth of the shell; then inclcsing the stiffener with a layer or layers of the same kind of rubber as above defined to present the outer wall 9l of the shell; then Winding around the exterior surface of the shell a rope or cord of twisted or braided filamentous material, such as jute, hemp, or any other fibrous vegetable substance suited to the purpose; then assembling the female member ofthe die with the male member and exerting pressure on the cup, thereby to cause the rubber to pass through or interlock with the orifices in the stilfener and the cordage partially to sink into the outer wall of the cup, and finally vulcanizing the cup in the usual or any preferred manner. is cheap, light in weight, and highly durable in use and will be found in practice to be thoroughly efficient in effecting an oil-tight juncture with the pump-barrel.

Instead of having the stitfener made from a sheet of metal, as shown in Fig. 2, the same may be constructed of reticulated wire fabric, as shown in Fig. Ll, and when this latter form of stiffener is employed the mode of assembling the parts of the cup will be the same as that above described. In either event, however, the stiffener extends .from the wall of the pump-rod opening to the upper edge of the cup, so that the latter is reinforced throughout its-entire area and is thus rendered practically non-yielding in character, or, in other words, the shell thus constructed will possess the requisite rigidity to effect the best results in use.

The bearing-surface 3, owingin part to the interlocking of the loose fibers of the cordage,

presents a continuous and even bearing-surface that in use is freely yieldable independently of the shell, thereby operating in an obvious manner to absorb and thus relieve the shell from undue strain, and by reason of the manner in which the cordage is held assembled with the shell, being, in effect, an integral part thereof, separation therefrom in use will be obviated.

The employment of a cup composed of rubber reinforced at the pump-rod opening and The article thus produced having a bearing-surface of textile fabric associated with the cup by being vulcanized thereto is old and well known and is herein disclaimed, as such construction is the. exact opposite of what is herein described, inasmuch as the bearing-surface is non-yielding or practically non-yielding, the device de-A pending for its effective operation upon the resiliency ofthe cup, whereas in the cup of the present invention the body portion is practically rigid and the bearing-surface yielding.

Having thus fully described the invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A cup for oil-wells, having its bearingsurface composed of cordage permanently associated with the cup and yieldable independently thereof.

2. A cup for'oil-wells, having its bearingsurface composed of cordage wound upon and permanently associated with the cup and extending beyond the same.

3. A cup for oil-Wells, having a reinforced body portion and a bearing-surface composed of cordage permanently associated with the body portion.

4. A cup for oil-wells, comprising a rubber body portion, and a bearing-surface of cordage vulcanized thereto.

5. A cup for oil-wells, comprising a rubber body portion having a stiffener permanently associated therewith, and a bearing-surface of cordage vulcanized thereto.

6. A cup for oil-wells, comprising a rubber body portion, an open-work stifener constituting an integral part of the body portion and extending throughout the entire area thereof, and a bearing-surface of cordage vulcanized to the body portion.

7. A cup for oil-wells, comprising a rubber body portion, a reticulated stiifener incorporated therewith and extending throughout the entire area thereof, and a bearing-surface composed of cordage vulcanized to the outer surface of the body portion.

8. The herein-described method of making cups for oil-wells which consists in taking plies of unvulcanized rubber, interposing between the plies a metallic stiffener, associating with the outer surface of the cup a wind- IOS IIC

ing of cordage, applying pressure to cause MARTIN WERT.

Witnesses:

SAMUEL CRAIG, JAMES M. BAUSER. p 

